The same fresh, medicinal, green woody tea tree everyone knows, grown and distilled to organic standard. Plant Therapy takes it from the leaves of Melaleuca alternifolia in Australia and South Africa and bottles it undiluted at a third of a fluid ounce. Certified organic means no GMOs and no prohibited pesticides in the soil the plants grew in.

The ingredient line is one item long. The maker's own suggestions run past the diffuser: three to four drops per 100 mL of water to scent a room, 2 to 5 percent in a carrier oil for skin, or a few drops in a white vinegar spray for a steamy bathroom. It carries Plant Therapy's KidSafe, Pregnancy Safe and Nursing Safe designations, and keeps two to three years.

We also stock the conventional Tea Tree, $8.99